package mx.com.asteca.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet Filter implementation class LoginFilter
 */
public class LoginFilter implements Filter {

    /**
     * Default constructor. 
     */
    public LoginFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		  HttpServletRequest httprequest =(HttpServletRequest) request;
	        HttpServletResponse httpresponse =(HttpServletResponse) response;
	        try{
	        if(httprequest.getUserPrincipal() != null){

	            System.out.printf("User authenticated with " + httprequest.getRemoteUser() + " username conected.");
	            httprequest.getRequestDispatcher("/index.jsp").forward(httprequest, httpresponse);
	        } else{
	            chain.doFilter(request, response);
	        }
	        }catch(Exception e){
	            //do something
	        }
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
